Gigantor.
My apologies to purists, i took liberties to make him 3d printable on a FFF/FDM printer without using support.
There are a few spots that look like they might be difficult.

I loved the old cartoons bad as they were.
This is my attempt to capture the flying pose, I will suspend mine with a string.

theme song :
Gigantor, Gigantor, Gigantor.

Gigantor the space aged robot,
He is at your command.
Gigantor the space aged robot,
His power is in your hand.

Bigger than big, taller than tall,
Quicker than quick, stronger than strong.
Ready to fight for right, against wrong.

Gigantor, Gigantor, Gigantor.

Modeled in Truespace5